Properties of ferrite-loaded cylindrical waveguides in the neighbourhood of cut-off
- 1 January 1962
- journal article
- Published by Institution of Engineering and Technology (IET) in Proceedings of the IEE - Part B: Electronic and Communication Engineering
- Vol. 109 (21S) , 90-94
- https://doi.org/10.1049/pi-b-2.1962.0017
Abstract
It is shown that in the neighbourhood of cut-off in an inhomogeneous waveguide, a considerable amount of energy travels in the negative direction, i.e. in the direction opposite to that of the wavefront. It has previously been shown that in the neighbourhood of cut-off it is possible for the group velocity to be negative; under these circumstances the negative power exceeds the positive power. This question is discussed, and a new concept of waveguide Q-factor is introduced.Keywords
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